Try reformatting your SD, see if that helpssometimes when I turnon my nintendo 3ds and go to setting and ds profile to load up the gateway it wont load the screen will turn black and I have to restart my 3ds is this normal?
I haven't updated to 2.02b yet, but I had a similar issue as well.
Removing the gateway cart before doing the DS Profile and re-inserting it after the DS boots back to the home screen seems to prevent this issue for me.
Yeah, I'm pretty sure this is a bug... as the older versions of the firmware never froze on me...I think thats the problem I always leave the red 3ds cart in im going to go into gateway mode then insert the cart from now on thank you